Weak infinite powers of Blaschke products

Weak infinite powers of Blaschke products
复制标题

Blaschke 产品的弱无限威力

DOI:
10.1007/bf02788696
复制
发表时间:
1998
期刊:
影响因子:
--
通讯作者:
K. Izuchi
K. Izuchi
中科院分区:
--
文献类型:
--
作者:
K. Izuchi

文献摘要

被引文献

相似文献

在开放单元磁盘Δ中取一个0 {zn}的Blaschke积。令非负整数sp=(p1,p2,…)的序列集使得∑n=1∞pn(1−|zn|) <∞且pn→∞asn→∞。我们研究了b的弱无穷幂类,这些类的性质依赖于∂Δ ({zn})中聚类点的集合(b)。证明了(b)=∂Δ当且仅当,由生成的道格拉斯代数。同时,证明了θ(S(b))=0当且仅当存在插值Blaschke积时。
Letbbe a Blaschke product with zeros {zn} in the open unit disk Δ. Letbe the set of sequences of non-negative integersp=(p1,p2,…) such that ∑n=1∞pn(1 − |zn|) < ∞ andpn→∞ asn→∞. We study the class of weak infinite powers ofb,Properties of these classes depend on the setS(b)of the cluster points in ∂Δ of {zn}. It is proved thatS(b)=∂Δ if and only if, the Douglas algebra generated by. Also, it is proved thatdθ(S(b))=0 if and only if there exists an interpolating Blaschke productBsuch that.